High silicon fluorite ore refers to a type of fluorite deposit with quartz as the main accompanying mineral. In addition to fluorite, other minerals are generally associated or coexisting in fluorite deposits. At present, according to the mineral composition of fluorite deposits, there are: fluorite quartz type, fluorite carbonate quartz type, fluorite barite quartz type, fluorite quartz sulfide ore type, etc.
After coarse and fine crushing, the high silicon fluorite ore undergoes a stage of grinding, with a grinding fineness controlled between -500 mesh 80% -90%;
Add a 20% -30% quality shellac solution to the fluorite powder after a grinding process, and use a vibrating screen to prepare a cohesive block with a fineness controlled at -200 mesh 70% -80%. After aging, obtain coarse selected mineral powder;
Disperse the coarse ore powder into a slurry, then add sodium carbonate, water glass, and a collector to the slurry, and use alkaline medium for coarse separation to obtain coarse concentrate i and sweep dressing a;
Disperse the ore dressing a into a slurry, and then add calcium oxide, water glass, and collectors to the slurry for sweeping to obtain intermediate ore 1 and tailings, which are then returned to the rough selection;
Disperse the coarse concentrate I into a slurry, and then add acidic sodium silicate and potassium aluminum sulfate to the slurry for cleaning to obtain coarse concentrate II and intermediate ore 2, which are returned to the cleaning process;
Repeat step (5) 5-8 times, with the final selection adding calcium oxide and water glass to the slurry for selection to obtain fluorite concentrate.
Taking the standard of fluorite concentrate fc-97c as an example: caf2 content ≥ 97.0%, sio2 content ≤ 1.2%. The caf2 content of fluorite concentrate prepared from high silicon fluorite ore is easy to reach, while the sio2 content is not easy to decrease. If the silica content in proportion 1 is 1.16%, and there are slight differences in the raw ore grade, beneficiation process, and beneficiation method, the silica content may not meet the standard.
Disperse the coarse ore powder into a slurry, then add sodium carbonate, water glass, and a collector to the slurry, and use alkaline medium for coarse separation to obtain coarse concentrate i and sweep dressing a;
Disperse the ore dressing a into a slurry, and then add calcium oxide, water glass, and collectors to the slurry for sweeping to obtain intermediate ore 1 and tailings, which are then returned to the rough selection;
Disperse the coarse concentrate I into a slurry, and then add acidic sodium silicate and potassium aluminum sulfate to the slurry for cleaning to obtain coarse concentrate II and intermediate ore 2, which are returned to the cleaning process;
Repeat step (5) 5-8 times, with the final selection adding calcium oxide and water glass to the slurry for selection to obtain fluorite concentrate.
Taking the standard of fluorite concentrate fc-97c as an example: caf2 content ≥ 97.0%, sio2 content ≤ 1.2%. The caf2 content of fluorite concentrate prepared from high silicon fluorite ore is easy to reach, while the sio2 content is not easy to decrease. If the silica content in proportion 1 is 1.16%, and there are slight differences in the raw ore grade, beneficiation process, and beneficiation method, the silica content may not meet the standard.
